Singing Games
Kids aren't the only ones to sing children's songs. Adults tend to remember songs they learned as children, and sing them to their own children. When different people sing children's songs, the lyrics change a bit.

Such was the case when a group of prisoners on the Cummins State Farm in Arkansas sang "Mary Mack." In this version, Mary had only three or four buttons on her back, whereas in the other version she had 24. Have you ever changed the lyrics when singing a song?